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M. C. Machine manufactures a full range of fasteners for a variety of demanding applications.  With our short lead times and competitive prices, M. C. Machine manufactures domestically produced high quality products in our Hopedale, MA factory.  M. C. Machine is an American Owned and Operated Small Business, producing quality Plastic Fasteners for challenging applications.  Whether your application requires a cost competitive, off-the-shelf solution, or a custom design, M. C. Machine has a plastic fastener solution.

Property
 
ASTM Method
 
PVC
 
CVPC
 
POLYPROPYLENE
                 
Specific Gravity
 
D792
 
1.35 - 1.45
 
1.55
 
.91
Tensile strength, psi
 
D638, D651
 
5,000 - 9,000
 
8,400
 
4,700
Elongation %
 
D638
 
2.0 - 4.0
 
____
 
400
Modulus of elasticity in tension, 105 psi
 
D747
 
3.5 - 6
 
____
 
____
Compressive strength, psi
 
D695
 
10,000 - 16,000
 
13,575
 
6,500
Flexural strength, psi
 
D790
 
10,000 - 16,000
 
____
 
____
Hardness Rockwell
 
D785
 
70 - 90 (shore)
 
R115
 
90
Thermal conductivity
 
C177
 
3.0 - 7.0
 
____
 
2.8
Thermal expansion, 10-5 per oC
 
D696
 
5 - 18.5
 
X 10-5
4.1
 
____
Resistance to heat, oF (continuous)
 
____
 
120 - 160
 
264 PSI
185 
 
335
Deflective temperature under load oF
 
D648
 
130 - 165
 
____
 
221
Volume resistivity
 
D257
 
>1016
 
____
 
1016
Dielectric strength
 
D149
 
4.25 - 1,300
 
1,250
 
550
Dielectric constand, 60 cycles
 
D150
 
3.2 - 3.6
 
____
 
____
Dielectric constant, 103 cycles
 
D150
 
3.0 - 3.3
 
____
 
____
Dissipation (power) factor, 60 cycles
 
D150
 
0.007 - 0.02
 
____
 
____
Dissipation (power) factor, 103 cycles
 
D150
 
0.009 - 0.017
 
____
 
____
Water absorption, 24 hr., 1/8" thickness, %
 
D570
 
0.07 - 0.4
 
.05
 
____
Burning rate
 
D635
 
Self Extinguishing
 
Self Extinguishing
 
Fair
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